Text Fixer Online Tools

Create Pop-up Windows

How to Use Javascript to Create Popup Windows

If you're in a hurry and quickly have to create a pop-up window for a single link then use the pop-up window generator.

If you can, then use the jQuery popup code instead - it's lot more compact and sturdy. Also jQuery does a great job of reducing the cross-browser problems that often arise when using javascript.

But if you can't use jQuery to integrate the code for pop-up window functionality into your website then use the javascript code below.

Modern Pop-up Windows with Javascript

We'll use a more modern approach and avoid putting the javascript code into the body of your HTML document. We will keep the html and the javascript separate which is a cleaner approach and in a practical sense will make things much easier for you to maintain going forward.

I've configured the code for 3 different size pop-ups but you can add more or change the existing ones easily.

Step 1: Add the css class to any link that you want to act as a pop-up

You can use popup1, popup2, or popup3 for class names as in this html link code example below:

<a href="http://www.textfixer.com/" class="popup2">Javascript Popup</a>

Step 2: Add this javascript to the head or preferably to an external javascript file

Click on the code to select it all and then do your CTRL+C copy magic.

<script type="text/javascript">

	//initialize the 3 popup css class names - create more if needed
	var matchClass=['popup1','popup2','popup3'];
	//Set your 3 basic sizes and other options for the class names above - create more if needed
	var popup1 = 'width=400,height=300,toolbar=0,menubar=0,location=0,status=1,scrollbars=1,resizable=1,left=20,top=20';
	var popup2 = 'width=800,height=600,toolbar=0,menubar=0,location=0,status=1,scrollbars=1,resizable=1,left=20,top=20';
	var popup3 = 'width=1000,height=750,toolbar=0,menubar=0,location=0,status=1,scrollbars=1,resizable=1,left=20,top=20';
	//When the link is clicked, this event handler function is triggered which creates the pop-up windows 
	function eventHandler() {
			var x = 0;
			var popupSpecs;
			//figure out what popup size, etc to apply to the click
			while(x < matchClass.length){
					if((" "+this.className+" ").indexOf(" "+matchClass[x]+" ") > -1){
						popupSpecs = matchClass[x];
						var popurl = this.href;
		//Create a "unique" name for the window using a random number
		var popupName = Math.floor(Math.random()*10000001);
		//Opens the pop-up window according to the specified specs
		return false;

	//Attach the onclick event to all your links that have the specified CSS class names
	function attachPopup(){
		var linkElems = document.getElementsByTagName('a'),i;
		for (i in linkElems){
			var x = 0;
			while(x < matchClass.length){
				if((" "+linkElems[i].className+" ").indexOf(" "+matchClass[x]+" ") > -1){
					linkElems[i].onclick = eventHandler;

	//Call the function when the page loads
	window.onload = function (){

Pop-up Windows Examples

If you want to see a working example of this code then check out the Pop-up Windows Examples Page.

NOTE: I've only tested this on modern browsers so your results may vary on Internet Explorer 8 or any of those older browsers but they should fall back gracefully and use the href destination link if a pop-up is not generated.

Most Popular Text Tools

Alphabetical Tools

Random Generators

Line Break Tools

Fun Text Tools

Text Changing Tools

SEO and Word Tools

Content Conversion Tools

HTML Code Generators

HTML Compression

HTML Encoding Tools